Home / 21,275.79-31,911.24-5,694.63

Finding the Fourth Proportional to 21,275.79, 31,911.24 and 5,694.63

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Solution

The fourth proportional to 21,275.79, 31,911.24 and 5,694.63 is: 8,541.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,275.79 : 31,911.24 = 5,694.63 : x
  2. Step 2: Convert to fraction form
    21,275.79/31,911.24 = 5,694.63/x
  3. Step 3: Cross multiply
    21,275.79x = 31,911.24 × 5,694.63
  4. Step 4: Simplify right side
    21,275.79x = 181,722,704.64
  5. Step 5: Solve for x
    x = 181,722,704.64/21,275.79
  6. Step 6: Final answer
    x = 8,541.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.